The most short-lived of all of Britain's constitutional experiments in India was the

1. The question asks to identify the shortest-lived constitutional experiment among the given options. 2. The Indian Councils Act of 1861 introduced limited representation but lasted until 1892. 3. The Indian Councils Act of 1892 expanded legislative councils and lasted until 1909. 4. The Indian Councils Act of 1909 (Morley-Minto Reforms) introduced separate electorates and lasted for about 10 years until the Government of India Act of 1919. 5. The Government of India Act of 1919 (Montagu-Chelmsford Reforms) introduced dyarchy and lasted until the Government of India Act of 1935. 6. Comparing the durations, the Indian Councils Act of 1909 had the shortest lifespan (1909-1919) among the options provided.